Fluid brake



Aug. 3, 1943, w NAY I 2,325,626

FLUID BRAKE Filed April 3, 1942 2 Sheets-Sheet 1 /3 EN TOR ATTORNEYSAug. 3, 1943. L; M. w 2,325,626

. FLUID BRAKE Filed April 3, 1942 2 Sheets-Sheet .2

i NNNNN on The springs I9 are mounted in sockets at vanes for urging thelatter outwardly against "the inner endsof the slots l3 and engag thethe inner circumference of the body 5 for wiping I engagement therewith,and of course to bridge the, space or chamber l2, aswill be apparentupon inspection of Figures 1; and 2 which likewise of the studs, tolimit outward movement of the by upper extensions 23 shaped to fit ,thesides of the member 22and formed onthe coverplates, a. fso that thebores provide fluid reservoirs 24 hav- 1 ing direct communication withthe. fluid'space or chamber [2 by ports 25' that have t heir'o;utletends opening into an inverted-channel 26 ex v with fluid from thereservoirs so that an ample quantity: of fluid is maintained therein atall t 7 times: The member 22 as well as the extensions 23 are formedwithjcehtrally disposed substan i tiall'y triangular shape'd uprightportions 2 9 and 7 30 respectively, I

Fromthe structure-sofar V t V seen'th'at' the wheel 3 is free to traveldue to the fact thatthe fluid freely circulates or' rev olves within thespace or chamber I2, inthat it is carried accordingly by the vanes, butin order to brake the wheel, I provide a fluid flow retarding or stopmember in the form of a valve which cooperatesflwith' the vanes forthatpurpose, that is I the retarding member is movable for disposaldescribed, it will a:

r bridging relation therewith. a

tending longitudinally of the inner face or the I member ZZ, asbestshown in Figure 5. 1 The reservoirs have inlet openings 21 that areclosed ,Qby screwplugs 28. By that construction, it will 1 be obviousthat the sp'ace'orchamber I Z'is filled i moved to its operativeposition, across the space or channel [2-, I provide a pair'of'cammembers,

each of which includes a relatively narrow housing 43 provided with'acover plate 44 secured to thebody thereof by screws, and mounted in thehousing is a roller to extendibeyond thear- 'cuate open end thereofx Therollers are readily L; removable in that they are held on shafts by thecover plates and the shafts are securedto the rear walls of the bodiesof the housing for disposal in iTh'ecam members are removably rotor andwithin the pockets l8. Cooperating with-the screws are ears'tl that areformed on and'extend laterally from the'ends of the side wallsof thebody portion ltlandj are mounted in slots'in the'rear walls 'of the cammembers to hold the latter against-casual displacement relative to theretarding member, as will be apparent By' that construction, it will beobvious that thecam members are carried'by' the retarding memberand aremovable against the studs 16 to move the vanes inwardly against theaction of their springs, toallow freepassage of the varies by theretarding member when" the latter is moved to its operative positioniThe operation of the. brake may be'described briefly as follows: Theretarding member 3lo32 isnormally in the retracted or inactive positionv in which it is-shown in Figure 5 of the drawings When'theretardingmember 31-32 is in this p0- sition, no part thereof extendsacros sthe compres sion chamber 12, and due thereto the oil in, the Vcompression chamber willcirculate freely under the influence of thevanes"! when the'rotor ll is turning. When it is desired-to stoptherotor across the space or chamber '12 to retard or stop theiflow of thefluid, andconsequently the rotor; to bring about a braking actionuponthe wheel. -The retarding} member in the form shown in cludes anupper flat shank portion ti and a lower hollowrelativel'yiwide flat bodyportion 32, and

the V retarding member is fittingly and slidably mounted in a socket 33that extends alongthe verticaljcente'r of the InemberZZ and the uprightportion 29, as'best shown in Figure 5; Fixed to the shank portion arerack teeth 34 having a toothed pinion 35meshing therewith, the pinion ibeing keyed w stub shaft 26 that'is mounted for rotation" in a bearingsleeve 31' and acollarSB,

H, the retarding member?3l32 is rnoved into operative'position: :Whenthe retarding' member 3i-32 is 'in this position, the 'body' portion 32thereof extends across the compression chamber 12 and stops thecirculation of the oil in the com pression chamber and thus eiiects thestopping of the rotor; During themovement of the retard- V 3I32. Afterpassing the retarding 'mernber' SI-32, the vane is returned to itsnormal posiing member iii-32 into operative position, the rollers 45move inwardlyinto position for contact by thestuds I6 of that van l4that is closer to the 1 inwardly moving retarding member. The

contact of the studs I6 with the rollers 45 effects the retraction ofsuch vane sufficiently to permit it to pass the inwardly movingretarding member tion by its spring,l9. The inward movement of the studsIS with rel'atiofnto the rotor in; under as best shown in Figure 4,which likewise's hows' that the shaft 35; extends beyond thesoute'r'endofthe sleeve and has a lever 39' fixed to the exi tendingend thereof.The opposite end of theleveryha's' a connecting rod attached thereto andthie'rod of course has suitable connectio-n with control means, such asa hand lever orfoot Secured to oneoi the cover plates 6 'for dis po salin'the path of'the lever 39 are abutment v members 4| and Alto limitswinging movement of the lever, and consequently the movement of theretarding member to its normal and opera tive positions, as will beapparent uponinspeotionjof Figure 5.

. In order to move the'vanes l4 out of the path of the retardinghiemberwhen the latter is being the influence of the r'ollers'flii, ispermitted by'tlie recesses I811. The compression chamber I2 is formed bythe'ringi, cover platestandthe retarding member 38 32; and I thecompressionfis effected by one of the vanes it. The compression is alsotransmitted to that cylinder '24 loc'atedibepedal both trowbrrinfg aboutthe applicatmVn-bf tween the retarding member.3l-,32 andthe comv thebrake'in the usualim'annela pressingvane, The housings'fiii which carrythe grollers ifi are mounted in the recesses 18 formed radially in theside'walls of the compression 'chamt ber i2, and'in effect constitutes apart'of the retarding member 3l,3-2, V a

"It is to be understood that changes may be mad in the construction, andin the combination "and arrangement of the several parts, provided thatsuch changes fall within thescope of the appended claims. e a r e r rsecured to the H 2 end walls of the body portion 32 of the retardingmember by'screws 45, for disposal in depending I frelationtherefrcm,upon opposite sides of the What I claim isz 1. In a fluid brake, acasingfa rotor-con Q centrically. mounted in the casing and spacedtherefrom to provide an annular fluid receiving chamber, spring pressedslidably mounted vanes operate with the varies for retarding thecirculation of the fluid to set up a brakingaction;

, means for moving the retarding means intoand out of the chamber, andmeansfor divertirigthe 1 vanes about "the retarding means and carried byl thejlatter. 1 v

i 2; In afluid brake, a casing, a rotor conl centrically mounted in thecasing and spaced; therefrom to provide an annular fluid receivingchamber, spring pressed slidably mounted vanes carried bythe rotorandnormally held'in wiping 1 engagement with said casing for circulatingthe 1 fluid aboutnthe chamber, means mounted in the casing for movementinto the chamber tocoo'perate with thevanes for retarding thecirculation of, the fluid to setup a braking, action, means formovingthe retarding meansinto and out ofthe chamber, studssecuredtoandlextendinglaterallyfrom the inner ends of the varies, and camlmeanscarried by the retarding means for disposal in the path of the studs fordiverting the vanes about the retarding means. I 3. In. afluid brake,ace-sing, means to hold a a the casing against rotation, arotorconcentrically mounted in the casing and spaced therefrom to provide anannular ,fluid receiving chamber, spring pressed slidably mounted van'escarried by the rotor and normally held in wiping engagement with saidcasingfor circulatinglthe' fluid about the chamber, said casing havingasocket Iin the upper portion thereof, means including a shank andmounted in thesocket for movement into thech'amber to cooperate with thevanes for; Q

, retarding the circulation of thefluid to set up a i braking action,manually actuatedmeans includ-f I ing rack teeth on the shank and apinion mesh ing with the teeth for moving the retarding means into andout of the chamber, studs'formed on the sides of the vanes,and cam meanssecuredto the sides of the retarding means and including rollers arraned in the pathof the studs for diverting the vanes about the retardingmeans,

'41 In a fluid brake,"a casing, afrotor. concentrically mountedin thecas ing and'spaced there from ,to provide-an annular fluid receivingchamber,lspring pressed slidably 'mountedvanes car rled, by the rotorand normally heldiin wiping ,for supplyingjthe samewith fluid.

, 5."In a fluid brake, a casing including a ring likebody, cover platesremovably securedto the sidesfofthe body for closing thesame, arotorconcentrically mounted in the 'bodyand spaced i therefrom taprovide anannularjfluidreceiving chamber, spring pressed slidably mounted vanescarried by the rotor iorrad al movement relative,

V 1 j thereto and normally heldin wipingengagement with the body forcirculating the fluid about the chamber, an elongated horizontallydisposed solid I. blocklike member providing-the upper portion of ,thebody and ,having horizontally disposed bores extending therethroughadjacent its ends,

, ends of thebores to providefluid reservoirs, said reservoirs havingdirect communication with the, f lchainberjsaid memberhaving. acentrally and ably mountedin the socket for movement into brakingaction, manual actuating means 'for chamber, and roller'cam meanscarried by-the retarding means for disposal in the path of' th'e vanes;for diverting the latter aboutthe retarde 1,

, ing means.

therefrom to'provide an. annular fluid, receiving chamber, springpressed slidably mounted vanes carried bythe rotor and, normally held inwiping engagement with the body for circulatingthe fluid about thechamber, said body having a eluding a shank and a body portion slidablylmounted in the socket for disposal of said body. portion intothe chambertojcooperatewith the vanes for retarding and stopping thecirculation ,ofthe fluid to set upa braking action, manual j means for moving theretarding means into and out of the chamber, said cover plates havingpockets and substantially; annular grooves in the inner faces thereofwith the grooves communieating with the pockets above the. lower endsof,

tion in depending relation therefrom and slid- 1 ably mounted in thepocketsand rollers included in the cam members and journaledat the'lowerends thereof for disposal in the path of the studs 5 means.

and including means. to have universal connec' rotor being of adiameter.relative-to that of the, casing to provide, an annular fluid receivingchamber, {said rotor" having radially disposed I slots therein openingthrough itslouter periphery,

a 7 spring pressed vanes mounted in the; slots; and ,normally held iniwipingfengagement'with said moving the retarding means into and out ofthe I chamber, brackets secured to the casing andarf ranged in thepath'of the control means to limit wheri'the' latter is moved into thchamber.

extensions formed on the cover plates and shaped. to iitt-hesidesofsaidinember for closing the vertically arranged socketztherein, meansslid-j the chamber to cooperate withthe vanes for retarding. thecirculation of th fluid 'to set up a moving the retarding means "intoand outof thef 6.In a fluid brake, a casing including a, ring like body,cover, plates removably secured to the sides ofthe body for closing thesame, a rotor zsconjcentrically mounted in the body and spaced socketjintheupper portion thereof, means in-. l

the latter, studs secured to the inner ends of the Q vanes andmountedfor travel in the grooves, cam m'ernberssecured to the sides ofsaid bodypor for diverting the vanes. about the retarding g 7. Ina fluidbrakefora vehicle wheel fined to a shaft, a casing, a bracket fixedtothe casing tion withthe chassis of a vehicletoghold the casv ingagainst 'rotationya rotor keyed to the shaft and concentrically mountedinthecasing, saidcasingfor" circulating the fluid about the cha n-f Vthe movementof the retarding means, and means 7 for diverting the vanesabout the retarding means

